For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningRemoval Procedure
Support the radiator and condenser from above using the
condenser tabs on each side.
Remove the lower steering intermediate shaft bolt (1).
Raise the vehicle on a hoist. Refer to Lifting and Jacking the Vehicle.
Remove the tire and wheel assemblies. Refer to Tire and Wheel Remov ...
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Disable the SIR System. Refer to SIR Disabling and Enabling.
Disconnect the negative battery cable. Refer ...
Vehicle, Engine and Transmission ID and VIN Location, Derivative and Usage
Note:: Graphic shows exemplary VIN.
The VIN plate is the legal identifier of the vehicle. The VIN plate is
located on the upper left corner of the instrument panel (I/P) and can
be seen through the windshield from the outside of the vehicle:
...